Typewriting-machine



-.E. s. DODGE.

TYPE'WRITING MACHINE.

I APPLICATION FILED MAY 29. I919. 1,330,063, Patented Feb. 10,1920.

. 2 SHEETSSHEET I.

INVENTUH ms ATTORNEY I I l I l I I l I I I m IIII r llll I .L a N Wm w wI O $2 O x I, v A ,4, e SNRSEEX u & M a e H L Q2QTNE55EE E. S. DODGE.

TYPEWHITING MACHINE- APPLICATlOH HLED' MAY 29, 19179.-

Pateii ted Feb. 10, 1920.

2 SHEETSYSHE EI 2.

yTNEEEEE INVENTEIR I HISATTIIIHNEY STATES PATENT oFFIoE;

ELBE T s. DODGE. F I 'IoN. NEW YORK. ASSIGNOR- "ro nniilinveron rrnwitirnn COMPANY, or ILION. NEW YORK. A CORPORATIONOF .NEW YORK.

l'rvrnwmgme-nncnmn.

I Il'ion. in'the county of Herkimer andv State ot. New York, haveinvented certain new and useful Improvements in Typewriting Machines, ofwhichthe following'is a specification- My invention relates totypewriting and like machines, andi more particularly to the actions ofsuchmachines.

i'ge he present invention is directed'to type act-ions having membersthereof 'operably connected by-a pin working in, aslot, and

one Objectv of the invention is toproduce a superior connection and onein which the walls of the; slot present smooth surfaces for cooperationwith the pin 'which slides in said slot and on the .walls thereof.

, A further object is to provide means in said'pin-and-slot connectionto facilitate the adjustmentof the type action after it is assembled. Y1.

To the above and otherv ends which will hereinafter appear, my inventionconsists in the features of construction, arrangements of parts, andcombinations of devices to be hereinafter described and claimed. In theaccompanying drawings. wherein like reference characters sponding partsin the different views.

Figure l'is a detail fragmentary side elevation of a center type actionembodying my'invention.

Fig. '2 is an enlarged detail fragmentary side View showing the heel ofa type bar and the upper end of its co-acting sub-lever,

,the'head of the connecting pin being sec- .tioned away.

side view of a type bar, with the finishing Fig. 3 is an enlarged detailfragmentary tool and showing-the tool introduced intov the openingleading to the slot. v Fig. 4c is a view corresponding to F g. 3 fbutshowing the parts as they appear at the limit of movement of the toolalong theslot in One direction, the -'tool being shown ;in

cross section takenthrough the scrapingv edges.

Fig

section being taken lengthwise of the slot Specification of LettersPatent.

indicate corre- 5 is an enlarged detail fragmentary sectional view ofthe type bar and tool, the

. Patented Beam, 1920.

, 1919. Serial No.300,611.'

and with the tool shown writing machine as may benecessary to at.

rive at an understanding. of my invention. I have also shown "the toolemployed in finishing parts of the type action:-

The type action shown in the present in-' stance comprises a key lever 1fulorumed at '2 1n the base 3 of the machine and prolvided with a fingerkey 4e and a returning spring 5. An upwardly extending-arm 6 on i thekey lever carries a laterally projecting pin 7 whichis received in asl0t'8 formed in the forward projecting arm of an angular sub-leveroractuating member 9 fulcrumed at 10 to a crossbar 11 secured to thebaseof the machine. An upwardly extending arm. of the sub-lever carriesalate 'ally projecting pin '12 formed with a head 13 and a cylindrical,or substantially cylindrical, stem or body portion. This pin extendsthrough a slot in its associated orco-acting member which, in thepresent instance, is a type bar 1% pivoted at 15to a slotted type bar'segment 16, the bar normally resting against a type bar rest or pad'17. The heel of the typebar is perforated to produce a slot '18, havingparallel sides or "walls 19, and it is in this slot and againstthesewalls that the pin 12'works. At'itse'nd nearest the pivot 15, the slot18 communicates with a hole 21, the diameter of which is greater-thanthe width of slot -18, and resulting in shoulders or reentrantangles 20at which the walls 19 terminate abruptly. At its'other' end, the slot 18communicates with a cross-slot 23, producing shoulders or reentrantangles 22 at which the otherends of the walls 19 abruptly terminate.Said cross-slot 23 is of a length cross wise of slot 18 greater than thewidth of said slot 18 and projects hecross-slot is of a 'width' lessthan the di-' ameter, of pin 12, so that said pin cannot ably, as shownin the drawing; said 'sjlot'23 yond .it in both directions, asshow'n;Said.

get; caught on the shoulders 22, .and pre'fermal position al'ter ea'ehaetuation a superior surface on the walls is of a' tltll less thanone-halt the diameter ol pin 1;. so that sa'itl pin'eannot. get on saitlshoultlers'at all.

Upon. the ttepression ot a linger key the. assoeiatetl type har will hemovetl trout its normal position to the printingposition inttlt'tlttttin tlflttttl lines. amt tluring movement ol' the parts the pin 1:3 willslitle hark amt torth along the slot hetwren amt on the walls 19thereol'. e tteeting a movement ot' the har in the usual manner.

lt will he umlerstoml that the si7.e amt shape ol the enlargett openingit is sueh that the lltiltl ot the pin l-- may he introttuee t throughsaitl opening tov -tssemhle the parts. hut that 'in the operation ol'the parts the. pin wittvalways remain within the slot to amt in aposition to eo-aet with the parallel walls ti thereof. to praetiee lmeter to havetlie. pin normally seatetl near the lower end ot the slot.as-shown in l igs. t amt- 2. amt say ahout l 'li-l of an inrh from thehottom wall it ot the slot.

The pm 1; is usually llltlttt ot a tliameter I 4 slightly less than thet listanee hetween the walls ot the slot. say ahout 8 ltltltl M an ineh.is-. lesirahle to have the pin normallyhear against the upper wall 1%) ot' the slot. as shown in Fig. '2. so that there may he no lost motionhetween the upper wall aml the pin when the type har is at rest. .\s aresult. when the ,parts return to northe pin will always eo-aet with theupper wall 19 ot the slot' amt teml to prevent any rehoumt ol' the typehar 'lrom the Pi-ltl or rest 17.

ln operation the pin t'i hears on the walls 1& ol' the slot. slittingoaek amt 'l'orth along saitl slot. amt it is highly important that thistlistanee hetween the walls he aeeurat'e amt that the eont: rt t'aresot' the walls present a smooth amt even surt'aee t'or eotiperation withthe pin. to provide an easy aeting type aetion. To this eml l suhjeetthe type har to a speeial trattment whiehwill now he tleserihetl. lCathsheet metal har is lHlllt'llttl or stampetl out amt the slot 18 amtenlargetl openings 2! amt '33. as shown in lwig. are punehetl therein.This leaves the walls ol' the slot In in. a relatively rough state withmarkings or seratehes. whieh e.\'-

' teml transversely ol the walls amt also leaves slight hurs at theettges or eorners of th walls ttltlSttl hy punening out the slot. l havenot attemptetl in the tlrawings to show this t'etat i\ely roughenetlstate of the walls oi. the slot. nor the slight hnrs whit-h appearat'ter punehing the slot in the har. hut they may he assmuetl to hepresent in the type har shown in Fig. S. to order to remove thisroughness ol slnt aee amt present 19 of the slot I employ a linishingtoot. pret'erahly ol' the eharaeter shown in tletail in Fig. T amt whiehis designated as a whole "walls amt al o enahles 'sure is appiietl intheamt the tool is reeiproeatetl against the on by the retand T.'ltl ortlerto give a eonvex eurvature to the walls lit. as hest shown in Fig. (3.This operation also ell'eetively removes any hurs that may he along theeorners ot' the to cooperate mor ell'eetively with the walls of the slotwithout eramping or himling. as will hereina'ttermore elearly appear.The tool may he l'ormetl hy making tour milling euts therein. two oneaeh sitle thereol'. 'lhis results in a working etlge 3h heing t'ormetlon ea'eh Sltlt. leaying a hevel or slope zit whieh extemlsaway l'rom theon hoth sltles thereol v 'lhe wult'h ot the tool. in asuretl from oneworking eilge' .ettge 'lt' to the other. is somewhat less than thewitlth ot" the slot to thigs. 'l amt 'ttl ol' the tool are of gratertliameter or witlth than sai l slot.

The tool is nsetl as 't'ollows: lt is lirst insertett into the o ieningI Fig. 3. antl..it is then movetl rta-tilinearly hat-k aml t'orthagainst one ot'. the walls '1} ol' the slot until that wall, islinishetl. thu smoothing the surt'aee' longitudinally ol' the slot or ina ttireetion at tlit'eetion in whieh the roughness is"pro t tlltttt hythe punt-hing operation. tn thi operation the tool is pressetllathtrlighlly against. the wall lt amt it requires a mum her ofreeiproeations ot' tlte tool to hring the surl'aee ol' the slot to thetlesiretl shape ant smoothness.

posite wall until that wall-is linishetl.- ln the reeiproeatit' ga'etion ol' the tool'l limt tlat the results are ltllllltllt'ttl inttll-ll'llliUF- t'ant respeet hy th ahrupt emls 2t) 'a'ml '12 of eaehsurl'aee or wall 19. that is to say. hy the tart that the sloteommunieates at its emls with the openings 2t amt 2 5. so that eaehstraight linishetl wall 19 termi'tiatesin a reentrant angle or treeeorner. o'r shouliler. The result is that the tool at'eaeh strokethereot' runs entirety oil of the surt'aee or etlge on wliieh'itis'operating. so that the metal is not pi letl up at the eml ot' eaehoperating stroke ot the tool hut lSl'tlllUY ttl eompletely: tha. is tosay. entirely to tho eml of the surt'aee umler treatment.

The shape 0t the tool ealt tlt t( lll' :h varietl hut the preterretl.l'orm is suhst'au tiallyas shown in the tlrawing; lt \eiltlh j notellthat the milling euts in in the tot-a are eoneave in hoth llireetions.amt tat-moss.

the pin 1'. thereal ter' it. as shown in right angles um .\tter one wallis tinishetl pres opposite ttllt t'lltlll although the hotly amt uppere'ml ltt l'tlttlls:

sort of a powder, dust or in small particles,

leaving a smooth surface.

It is of course desirable in "the use of this tool that it be guided inits motion with matic machine has been-devised for this purpose. -In theuse of said machmedt has 'right arm of thecorrespoinlingsub-leversufficient precision and that a suitable degreeof pressure be applied to it. An autobeen found that about 160 straightline movements of the tool sufiices to finish one side of the slotandthe amount of metal removed from the walls of the slot 18 by the tool issufficient ,to enlarge the width of the slot from 2/1000 to 4/1000 of aninch,

the enlargement of about 2/1000 of an inch being found preferable.

It hasbeen found in practice that my invention gives excellent results,producinga superior and highly satisfactory bearing surface on each ofthe walls of the slot 18, said surfaces having'the characteristics ofbearing surfaces scraped smooth lengthwise. or in the direction of thesliding thereon of the pin 12. I

The construction as herein shown also.

possesses certain advantages in the assembling and adjustment of themachine. In practice, the key levers 1, sub levers 9 and type bars 14,are all assembled before the type rest 17 is put in place, so that=thetype bars all hangunsupported attheir f6r ward ends. Due to the weightof the type bars and to the tension of the springs 5, each type bardrops down at its forward end and the upright arm of its sub-lever movesrearwardly until both are arrested by the pin 12 seating against thewall 21 of the cross slot 23, the type bar being then in an inclinedposition below the norfacture, one or more of the type bars dropmaterially below. or remain materially above, such arc. then it is madeevident that adjustment of those particular actions is required. It willbe noted that under the conditions mentioned, all of the pins -12 occupyidentical positions in their :slots 19. that is to say. they are all incontact with the walls ill of the cross-slots 23. If any type bar hangstoo low. that can be corrected by shortening the up- 9; and if any typebar is/too high, this can be remediedby lengthening said upright arm.The sub-lever arm may be shortened by making two lateral bends in it inopposite directions, without moving the pin 12 to the right or to theleft and said arm may be lengthened by a swaging operation with asuitable tool, such as a suitable pair of pliers; or many of thecustomary Ways practised by assemblers in this art; Only a slightadjustment of the arms carrying the pins 12 is usually necessary to curethe de-, fects and bring the type bars into alinement.

A proper adjustment having been attained,

the free ends of all the bars are elevated and supported in place on thetype rest 17.. As a result thereof the pins '12 will. no longer beseated against the walls 24 but each pin will be brought into properrelationship with its slot and with the walls 19 thereof, and all ofthem in substantially the same relationship, and the parts are thenready to be operated. The degree or character of acceleration of thetypebar afforded by the operation of the pin 12 in the slot 18,

depends in parton the initial or normal position ofsaid p-in along saidslot, and by the described adjustment, this initial position andconsequent initial leverage and acceleration are made substantiallyuniform throughout the system of type actions.

By making the walls 19 of the'slot convex as shown, cramping action isavoided between the walls of the slot and the pin when the upper end ofa sub-lever and the heel of its associated type bar are not moved absoslutely in parallel planes during the opera tion of the type action. Thismovement of the parts out of parallelism is apt to happen, moreparticularly in the side actions, and results in a change in the angularrelation of each pin 12 to the plane of the heel of its associated typebar. The con vex surfaces of the walls 19 at this time prevent the pinfrom binding against the walls of the slot.

\Vhat I claim as new and desireto secure by Letters Patent. is

1. In a type action. the combination of two coacting members. one havinga slot and the other a pin which works in said slot, the slotcommunicating at one end with an opening of greater. length crosswise ofthe slot than the width of the slot and of less width than the diameterof the pin.

2. In a type action. the combination. of two coacting members. one haing: a slot and the other a pin which works in said slot the slotcommunica ting at one end with an opening of greater length crosswise ofthe slot than the width of the slot and of a width less than onehalf thedianu-ier of the pin.

-1. In a type artion. the combination of two courting members. onehaving a ally projecting pin and the other a slot iii'l parrelleleon\'e.\ side walls with which the pin eoaets, eaeh wallterminatingabruptly at both ends in rei llt-ruut'.gnglts or shoulders. n

4, A type liar having a t therein for a pin whereby said type bar isoperated, said slot having parallel walls or edges on whieh said pinhears. and eounnnnieat in at both ends with openings whet-eh saidbearing walls terminate in reeutran't angles or. shoulders, ands-aidhearing walls having their'surl'aees seraped sinoot'h lengthwise fromone of said shoulders to the other.

5. A type, aetion comprising a type har having a slot therein and asub-lever having a late ally projecting pin which slides in said slot,the slot communicating at eaeh end with an enlarged opening of greaterwidth than "the width ot said slot eaeh eularged opening: extending.laterally of said slot at hoth sides thereot', sul stan tiall as and forthe purposes speeiti ed.l

t. i\ 't' \pe har having" a slot to aeeonunodate an operating pin andhaving also a eonneet'ing transverse sloa the outer wall ot" which isadapted to hear against said pin so as to taeilitate proper :uljustaneutSigned at llion. in the eounty ot' l-le rl imet. and State of New Yorkthis 21st day ol EliBl l 'l S. DOUG E.

\Yitnesses:

"'(iuouau A. Sum,

HENRY 'l. Lawns.

